砾石层气体钻井气液转换工艺技术与应用  

RESEARCH AND APPLICATION OF GAS-FLUID CONVERSION DRILLING TECHNOLOGY IN GRAVEL LAYER

作　　者：邓柯 廖兵 陶思才 

机构地区：[1]川庆钻探工程公司钻采工程技术研究院 [2]中国石油欠平衡与气体钻井试验基地 [3]川庆钻探工程公司塔里木工程公司

出　　处：《钻采工艺》2015年第1期19-21,1,共3页Drilling & Production Technology

基　　金：中国石油天然气集团公司统筹项目"塔里木库车山前钻井提速技术"(项目编号2013T-0102-001)部分研究成果

摘　　要：基于砾石层地质特征,开展了砾石层气体钻井后转换过程中钻井液对井壁伤害机理分析,得出砾石层钻井液转换时易发生井塌、井漏及携砂困难等问题。文章通过室内实验,优配出"二强二高一低"聚磺-KCl混油钻井液及配套的特殊前置液、特殊堵漏浆及高黏切高密度钻井液,提出不同工况条件下的气液转换工艺措施,形成了适合砾石层地质特点的钻井液转换工艺技术,通过在A井现场应用,气液转换期间未发生井塌、井漏等复杂,用时仅0.4 d,取得良好应用效果。Based on the geological characteristics of gravel layer,the drilling fluid damage mechanism to wellface was analyzed during gas- fluid conversion,and the existent problems were also discussed,such as well collapse,lost circulation and difficult carrying cuttings in gravel layer. In order to solve the problems,the polysulfonate- KCl oil emulsion drilling fluid and matching special preflush,plugging slurry and high shear viscosity mud were developed,the gas- liquid conversion measures were proposed under different working conditions,and the drilling fluid conversion technology suited for gravel layer was formed. Through field application of the gas- fluid conversion technology in A well,the borehole collapse and leakage weren't happened during gas- liquid conversion,and good results were achieved with only 0. 4 days.

关 键 词：砾石层 气体钻井 钻井液转换 聚磺-KCl混油钻井液 

分 类 号：TE24[石油与天然气工程—油气井工程]